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🛡️ Travel smart, protect smarter — the only car seat your growing family needs!
The Diono Radian 3R is a premium 3-in-1 convertible car seat engineered with a reinforced automotive-grade steel frame and ComfortPlus memory foam. Designed to grow with your child from birth to booster (5-120 lbs), it offers extended rear-facing protection up to 50 lbs and a slim-fit profile that fits 3 across in most vehicles. FAA approved and foldable for travel, it combines safety, space-efficiency, and convenience for the modern family on the go.






























| ASIN | B083F5P7VP |
| Age Range Description | Newborn |
| Best Sellers Rank | #1,424 in Baby ( See Top 100 in Baby ) #8 in Convertible Child Safety Car Seats |
| Brand | Diono |
| Color | Black Jet |
| Customer Reviews | 4.7 out of 5 stars 8,040 Reviews |
| Forward Facing Car Seat Minimum Height | 29.9 Inches |
| Forward Facing Maximum Weight | 120 Pounds |
| Forward Facing Minimum Weight | 26.5 Pounds |
| Global Trade Identification Number | 00677726506200 |
| Harness Type | 5-Point |
| Included Components | radian® 3R car seat, detachable rear-facing base, foam harness pads, lap belt cushion, Safe Stop®energy absorbing harness, rear-facing top tether, Instruction manual |
| Infant Toddler Car Seat Type | Convertible Car Seat |
| Installation Type | Latch |
| Item Dimensions D x W x H | 16.1"D x 16.9"W x 28.4"H |
| Item Type Name | All-in-One |
| Item Weight | 23.02 Pounds |
| Manufacturer | Diono |
| Manufacturer Warranty Description | 12 months |
| Material | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Material Type | Alloy Steel, Plastic, Polypropylene, Polystyrene |
| Maximum Height Recommended | 57 Inches |
| Maximum Weight Recommendation | 120 Pounds |
| Minimum Height Recommendation | 18.1 Inches |
| Minimum Weight Recommendation | 5 Pounds |
| Model Number | 50620 |
| Number of Height Positions | 1 |
| Orientation | Convertible Seat |
| Part Number | 50620 |
| Product Dimensions | 16.1"D x 16.9"W x 28.4"H |
| Rear Facing Car Seat Maximum Height | 44.1 Inches |
| Rear Facing Maximum Weight | 50 Pounds |
| Rear Facing Minimum Weight | 5 Pounds |
| UPC | 677726506200 |
| Unit Count | 1.0 Count |
E**R
Fits 2 in a row with additional infant seat in Toyota Camry!
We bought 2 of these to fit in the backseat of our 2010 Toyota Camry. 1 rear facing, middle forward facing, next to infant (Uppababy Mesa) seat. Middle forward facing was the only way it would fit. Pro’s: slim, sturdy, easy for our kids to get into themselves, latch system is easy/works well. Good customer service from Diono. Our first one didn’t have the rear-facing piece in the box. Cons: * Very heavy! * Tall backside. Check your car seat manual whether a car seat is allowed to touch/rest against the front seat (if rear facing). Now having moved one to the middle back seat (forward facing) on our Honda Odyssey, it sits higher and blocks the rearview a bit. Wasn’t an issue in the Camry. No cupholders- fine, since that wouldn’t fit anyway. Not as much padding, so perhaps less comfortable, but both our kids are fine in them. Overal conclusion: great car seat if you have a tight back seat!
J**S
I like it but it's heavy and tricky to install
I got this for my youngest who sits in the middle with booster seats on each side for her brothers. It is narrower than the one it replaces and I really like the red color and design. It looks like a high quality car seat and feels premium. It looks great and fits great in my Range Rover Velar. Overall, I like it but there are a few things to consider: PROS 1. Great looking design 2. Premium feel 3. Easy for my 4-year-old daughter to buckler herself 4. Narrow 5. Comfortable for my daughter CONS 1. It's VERY heavy. If you have to take this seat out from time to time, that might be a concern. This is for my car but my wife would never go for a seat this heavy. It seems like it weighs twice as much as the older Maxi Cosi seat it replaces. If the weight of the seat is a concern, avoid this one. 2. There is nothing intuitive about installing this thing. I had to watch a YouTube video just to find the installation instructions. I'm not kidding - they are hidden in the back fabric and housing. Once you have the instructions, they are not much help. This illustrations are professionally drawn but hard to understand. Even getting the various straps out of the back plastic housings is tricky.
A**N
Easy to Install and Uninstall
They truly do fit 3 across, even in my compact SUV. The quality is nice and easy to assemble and clean! One of the easiest car seats to install and uninstall in a car. Personal I would not recommend for Forward facing though, even though they say they can, it does not seem secure enough for me!
A**R
As shown. Very sturdy.
I am very happy with this car seat. I had trouble with cupholders but made it work. Everything else is great. Safe and sturdy.
R**G
Best car seat out there!
Our favorite car seat / booster or all time! Worth the price!! Fits 3 across, easy for toddler to buckle themselves and goes in the third row of the car! Also it’s good for 10 years which is much longer than most car seats!
L**A
Slim and easy to clean
Really slim. Cup holders are easy to break off and a little awkward. Easy to buckle and unbuckle even with long nails. My kid can even tighten the straps herself (4 y/o). Comfy for my kid. She likes the sleek look and is excited about her new cool car seat. Pretty easy to clean. A little heavy and doesn’t sit up easy when out of the car. Haven’t used rear facing but great for front facing.
P**S
Great for Tight Spaces and Growing Kids
This is an excellent car seat for a growing toddler or child. We loved it so much that we purchased one for every car, including the grandparents’. My son had difficulty getting in and out of his previous car seat and struggled with buckling, but he has completely mastered it with this one. He feels more independent and proud that he can get in and out on his own. Another big plus is how space-conscious this seat is. We can comfortably fit two car seats and a third person in the middle seat of our SUV, which is perfect when traveling with extra passengers. Installation is easy, making it simple to move between different vehicles if needed.
S**F
Magenta is beautiful, kids love these car seats
Had it for about 2 months. This radiant pink is beautiful! My toddler loves it too. It was more difficult to install it rear facing so ended up setting it up forward facing. Instructions aren’t super easy to follow, nor the installation process. Lucky for me husband got it figured out. Removability: Haven’t removed it yet since the day it was installed so can’t speak to that. It fits great and gives plenty of space for children to move around when not buckled in. Based on my children’s unspoken review (I can tell they love sitting in it and enjoy being able to see through the window), I would definitely recommend other parents to get it. There isn’t much side padding like impact safety that other car seats have but it doesn’t bother me since it’s certified for safety. My 3 year old can unbuckle the top part himself. The buckle design is durable and yet comfortable. Haven’t seen any marks on the neck from the harness rubbing against their body. I think it’s great! I hope it will last for a long time as advertised.
E**I
Excelente tamaño y seguridad
La mejor silla si tienes una familia de 3 niños caben perfectamente 3 sillas en la parte trasera del coche
L**T
Buen asiento
Ocupas ser un Ingeniero Aeronautico o automotriz para Instalarlo. Es demasiado Dificil su instalación. Pero brinda buena protección al BB
L**A
5 point harness for older children
Great chair struggled to get a chair with a 5 point harness for my 5year old who can't use a normal seatbelt.
J**E
Our favourite car seat
We love this chair; and have had a variety of other brand car seats over the years. 1) it's more narrow and streamlined than anything else we've used - which is why we bought it (3 kids in a 5 year window and a 3 across car seat configuration). 2) The straps adjust easily; tighten and loosen smoothly! (other seats we've used feel like you're constantly tugging and readjusting and just fighting with the straps. I've never fought with these). 3) maintenance is simple, cover goes on and off easily and you can throw it in the wash. It has other cool features we haven't used much, but I like that it can basically fold up if you ever travel with it. "Cons". a) The seat is heavy, so if you're moving it from one car to another often that would be a pain. Personally I like how solid it feels, and we don't move it much so it's not an issue. b) we put a small rip in the cover fabric the month we got it, but were able to sow it back up and no issues since (one of the kids climbed over the back of the seat and their shoe somehow snagged the cover). c) REAR FACING the seat leans back really far (further than any other seat we've used) - you have to move the front seat ahead of it quite a ways up for it to fit properly. They do sell an angle adjuster that can go under the seat to help mitigate this, but I haven't purchased one. Either way, we love it and maybe should've picked a more gender neutral colour. I wish we had started with this car seat from the beginning with our first kid.
L**I
Great Car Seat – We Bought Two
This was our first car seat purchase of this brand, and we’re so happy with it! Our child loves it even on long drives. It was super easy to install, and we felt confident choosing it after reading the strong safety ratings. It’s also easy to clean the cover comes off easily and can be tossed in the wash, then air-dried. It’s narrow enough to fit multiple seats across and works great rear-facing in smaller vehicles as well. We liked it so much, we bought a second one for our other vehicle. Great quality at a reasonable price highly recommend!
Trustpilot
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